From: James Norris <jnorris@codesourcery.com>
To: GCC Patches <gcc-patches@gcc.gnu.org>
Cc: "Joseph S. Myers" <joseph@codesourcery.com>,
Nathan Sidwell <Nathan_Sidwell@mentor.com>,
Jakub Jelinek <jakub@redhat.com>
Subject: [OpenACC 6/7] host_data construct
Date: Thu, 22 Oct 2015 19:20:00 -0000 [thread overview]
Message-ID: <562936CF.5030200@codesourcery.com> (raw)
In-Reply-To: <56293476.5020801@codesourcery.com>
[-- Attachment #1: Type: text/plain, Size: 242 bytes --]
libgomp/libgomp.map b/libgomp/libgomp.map
- Add new symbol GOACC_deviceptr.
libgomp/oacc-mem.c b/libgomp/oacc-mem.c
- Add new function GOACC_deviceptr() to handle pointer lookup
for host_data regions.
[-- Attachment #2: p6.patch --]
[-- Type: text/x-patch, Size: 1251 bytes --]
diff --git a/libgomp/libgomp.map b/libgomp/libgomp.map
index 2153661..2a43a8c 100644
--- a/libgomp/libgomp.map
+++ b/libgomp/libgomp.map
@@ -378,6 +378,7 @@ GOACC_2.0 {
GOACC_wait;
GOACC_get_thread_num;
GOACC_get_num_threads;
+ GOACC_deviceptr;
};
GOACC_2.0.1 {
diff --git a/libgomp/oacc-mem.c b/libgomp/oacc-mem.c
index af067d6..497ab92 100644
--- a/libgomp/oacc-mem.c
+++ b/libgomp/oacc-mem.c
@@ -204,6 +204,38 @@ acc_deviceptr (void *h)
return d;
}
+/* This function is used as a helper in generated code to implement pointer
+ lookup in host_data regions. Unlike acc_deviceptr, it returns its argument
+ unchanged on a shared-memory system (e.g. the host). */
+
+void *
+GOACC_deviceptr (void *h)
+{
+ splay_tree_key n;
+ void *d;
+ void *offset;
+
+ goacc_lazy_initialize ();
+
+ struct goacc_thread *thr = goacc_thread ();
+
+ if ((thr->dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM) == 0)
+ {
+ n = lookup_host (thr->dev, h, 1);
+
+ if (!n)
+ return NULL;
+
+ offset = h - n->host_start;
+
+ d = n->tgt->tgt_start + n->tgt_offset + offset;
+
+ return d;
+ }
+ else
+ return h;
+}
+
/* Return the host pointer that corresponds to device data D. Or NULL
if no mapping. */
next prev parent reply other threads:[~2015-10-22 19:19 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-22 19:14 [OpenACC 0/7] " James Norris
2015-10-22 19:15 ` [OpenACC 1/7] host_data construct (C/C++ common) James Norris
2015-10-22 19:15 ` [OpenACC 2/7] host_data construct (C FE) James Norris
2015-10-22 19:16 ` [OpenACC 3/7] host_data construct (C front-end) James Norris
2015-10-22 19:18 ` [OpenACC 4/7] host_data construct (middle end) James Norris
2015-10-22 19:19 ` [OpenACC 5/7] host_data construct (gcc tests) James Norris
2015-10-22 19:20 ` James Norris [this message]
2015-10-22 19:22 ` [OpenACC 7/7] host_data construct (runtime tests) James Norris
2015-10-22 20:42 ` [OpenACC 0/7] host_data construct Joseph Myers
2015-10-22 20:53 ` James Norris
2015-10-23 16:01 ` [Bulk] " James Norris
2015-10-26 18:36 ` Jakub Jelinek
2015-10-27 15:57 ` Cesar Philippidis
2015-11-02 18:33 ` Julian Brown
2015-11-02 19:29 ` Jakub Jelinek
2015-11-12 11:16 ` Julian Brown
2015-11-18 12:48 ` Julian Brown
2015-11-19 13:13 ` Jakub Jelinek
2015-11-19 14:29 ` Julian Brown
2015-11-19 15:57 ` Jakub Jelinek
2015-11-30 19:34 ` Julian Brown
2015-12-01 8:30 ` Jakub Jelinek
2015-12-02 15:27 ` Tom de Vries
2015-12-02 15:59 ` Thomas Schwinge
2015-12-02 19:16 ` Cesar Philippidis
2015-12-02 19:28 ` Steve Kargl
2015-12-02 19:35 ` Jakub Jelinek
2015-12-02 19:54 ` Cesar Philippidis
2015-12-02 22:14 ` [gomp4] " Thomas Schwinge
2016-04-08 13:41 ` Fortran OpenACC host_data construct ICE (was: [gomp4] Re: [OpenACC 0/7] host_data construct) Thomas Schwinge
2016-02-02 13:57 ` [OpenACC 0/7] host_data construct Thomas Schwinge
2015-11-13 15:31 ` [Bulk] " Jakub Jelinek
2015-12-23 11:02 ` Thomas Schwinge
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